SharePoint Web Application not creating successfully?

Hi, In SharePoint 2013 whenever try to create new web application in Central Administration site then under Web Application it showing that new web application created but under “C:\inetpub\wwwroot\wss\VirtualDirectories\Port” folder is totally empty  means the neither web config file nor other folders creating.

For example if I am creating new web application “http://myworld :2345” then under  “C:\inetpub\wwwroot\wss\VirtualDirectories\2345\” folder noting is coming it’s totally empty so now I am also not able to create new site collection.

One more thing after creating new Web Application if clicking on General Setting then below error is coming:

Updates are currently disallowed on GET requests.  To allow updates on a GET, set the 'AllowUnsafeUpdates' property on SPWeb.

So to resolve the issue I ran below command:

$w = get-spwebapplication http://yourwebapplication
$w.HttpThrottleSettings
$w.Update()

Previously I was able to create Web Application successfully but now error is coming pleas guide me how to resolve the issue.